STUDIES ON RHINOESTRUS SP (DIPTERA: OESTRIDAE) LARVAE INFESTING DONKEYS ( EQUUS ASINUS ) IN EGYPT 1) Incidence and seasonal variations

Document Type : Original Article

Authors

1 Parasitology and Animal Diseases Dept., National Research Center, Dokki, Cairo, Egypt.

2 Parasitology Dept., Faculty of Veterinary Medi- cine Cairo University, Giza, Egypt.

Abstract

Examination of 144 donkey heads at the postmortem during the period from September 1989 up to the end of August 1990 revealed that 88 (61.11%) donkeys were infested with Rhinoestrus purpureus. The larvae were present in the 88 head examined theroughout the year with highest mean larval number during June (57.86%). The larvae were absent during November and December. The monthly prevalence of each 1st, 2nd and 3 rd instar larvae was determined. Each larval instar occurred in two peak of infestations; March and June for the lst and 2nd larval stages and March and August for the 3rd larval stage The size of infestation showed that the percentage of donkeys infested with 1-50, 51-100 and 101-150 larvae were 50.69, 9.03 and 1.39% respectively. It was concluded that, two generations of R. purpureue occurred during the year and the adult flies were active during two seasons; from mid-January, mid-April and from early June to late September. Two annual treatment of donkeys during March and June were recommended to eliminate most of the larvae from infested donkeys.

Main Subjects

Veterinary Medical Journal (Giza)
Volume 40, Issue 1
January 1992
Pages 131-143

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